Source: “Sevenich bei Muenstermaifeld in alter Zeit--Beitraege zur Genealogie der Maifelder Bauerngeschlechter,” by Hans Bossier in “Die Maifelder ACKERMANN-Familie.”
Source of his birth date and his baptismal and wedding information: Records of St. Martin and St. Severus Catholic Church in Muenstermaifeld.
His baptismal sponsors were Johann Liess and Agnes [Daum who was married to his father’s brother Johann] Buechel.
He was a baptismal sponsor in 1772 for Anna Sybilla, the daughter of Arnold Rosenzweig and Katharine Elisabeth Kaeff of Muenstermaifeld. His future wife Anna Sybilla Boos was also a baptismal sponsor for Anna Sybilla Rosenzweig.
He was a scabinus in the Catholic church.
Johann and Anna Sybilla were third cousins once removed as well as fourth cousins once removed. Anton Ackermann and Clara Sevenich were his ggg grandparents and her gg grandparents. Gangolf Sevenich and his wife were Johann’s gggg grandparents and Anna Sybilla’s ggg grandparents.

Source: Records of St. Martin and St. Severus Catholic Church in Muenstermaifeld.
She was a baptismal sponsor in 1772 for Anna Sybilla, the daughter of Arnold Rosenzweig and Katharine Elisabeth Kaeff. Her future husband was also a baptismal sponsor for Anna Sybilla.
Johann and Anna Sybilla were 3rd cousins once removed. Anton Ackermann and Clara Sevenich were his ggg grandparents and her gg grandparents.